Chula Vista is the second largest city in the San Diego metropolitan area, the seventh largest city in Southern California, the fourteenth largest city in the state of California, and the 74th-largest city in the United States. The population was 243,916 as of the 2010 census. Located just 7.5 miles (12.1 km) from downtown San Diego and 7.5 miles (12.1 km) from the Mexican border in the South Bay region of the metropolitan area, the city is at the center of one of the richest economic and culturally diverse zones in the United States. Chula Vista is so named because of its scenic location between the San Diego Bay and coastal mountain foothills.